After Air Force One landed at Newark Liberty International Airport, the president's motorcade headed for Bedminster and drove through the heart of Trump National, past a crowd of fans near the putting green and the clubhouse. Trump could be seen waving out the window as the motorcade rolled by, then headed for his home on the property, which sits adjacent to the 15th hole.

Less than two hours later, Trump made the short trek to the skybox that's been built behind the 16th tee, receiving cheers and applause along the way. He occasionally wandered toward the box's windows to point and wave to fans, while the Secret Service and USGA officials handled crowd control outside the box.

USGA officials repeatedly asked the crowd to keep quiet in order to avoid disrupting play, which was taking place just yards away.

6:15 p.m. -- POTUS has left the building. "Who's going to win tomorrow?" he asked the crowd. "Christie Kerr!" somebody yelled back, and that was a good answer because Kerr was the last golfer to visit him in his skybox.

5:04 p.m. -- Lexi Thompson just walked into the skybox to have a word with Trump. She's been a playing partner of his in the past.

4:47 p.m. -- Trump's friend and occasional playing partner, Cristie Kerr, tried getting his attention after finishing up on the 15th green, which is right next to the skybox.

But Trump had his backed turned and was locked in conversation, so her efforts were unsuccessful.

4:41 p.m. -- Per White House pool reports, the tail number on the small plane that continues circling the course has been tracked back to Fox Sports.

By the looks of it, the plane has a camera attached to one wing and is shooting footage for the broadcast.

3:50 pm -- Not much is going on inside the presidential skybox -- the First Fan apparently was enjoying some French Fries -- but there was an interesting show in the air. Multiple people spotted a helicopter and a fighter plane that buzzed the airspace over the course. It appeared the chopper and jet were taking a look at a small plane, continues to circle the area.

3:47 pm -- Of course, as soon as we typed that, Lewis made a triple bogy on the 11th hole. Jinx in full effect.

3:32 pm -- American golfer alert: Stacy Lewis is absolutely on fire. She has four straight holes and has pulled to 7 under, one stroke behind leader Shanshan Feng. Again: We don't know for sure if Trump plans to award the trophy on Sunday, but it seems more likely if the winner is American.

"That was kind of what intrigued me to start the week was that we had never had an active sitting president at one of our events," Lewis said on Thursday. She was on the 15th hole when he arrived, although she said she didn't notice the commotion.

"So I was kind of excited about the prospect of, regardless of who it is, that he came here to watch us. He Tweeted about coming to the U.S. Women's Open. Some people didn't know it was going on. It's kind of a historic and cool moment to have our president here."

2:38 p.m. -- Trump is in the skybox behind the 16th tee. The president's motorcade left his house near the 15th hole and pulled up right outside the box at 2:29 p.m.

Once inside, Trump spent about five or 10 minutes chatting with Suzann Pettersen, a Norwegian player who has been a supporter of the president. This is from the official White House pool report on the moment:

POTUS spoke with Suzann Pettersen in the glass-enclosed viewing area for about 10 minutes. Pettersen was ID'd by several photographers, and your pooler (who knows nothing about golf) has confirmed it was her.

POTUS gave Pettersen a blue "Make America Great Again" hat. She held the hat up and the crowd cheered. He kissed her on both cheeks when they greeted each other.

Pettersen is a Norwegian golfer who is playing in this weekend's tournament.

POTUS is now watching golf in the viewing area.

2:02 p.m. -- There's plenty of Secret Service all over the grounds today, but or so agents just arrived, walked around the clubhouse and headed toward the president's skybox.

Still no POTUS sighting of yet.

12:44 p.m. -- About a half dozen photographers from various outlets - including our own John Munson - have gathered alongside the 15th hole, which runs adjacent to Trump's house on the property.

There's been some movement around the home, which has the motorcade parked outside, over the past few hours, just none from the president or anyone in his family so far.

But if and when Trump decides to make a move today, it'll no doubt be documented.

12:21 p.m. -- Saturday's first sign of Trump didn't come in person at the golf course, but via Twitter.

And by the sounds of it, the president is in a pretty good mood today:

Stock Market at new all-time high! Working on new trade deals that will be great for U.S. and its workers!

Now that we know Trump is up and about, despite the jetlag from his France trip, perhaps he's preparing to head out onto the course. After all, some big names - like Lexi Thompson, Christie Kerr, Stacy Lewis and Lydia Ko - tee off within the next hour or so.

11:48 a.m. -- The White House pool reporters have arrived at the USGA's media tent. Many of them were with the president on his recent trip to Paris, so we can only imagine that this is not a welcome change of scenery for the 13 men and women following his every move.

For the record: They don't know when he's going to head out onto the course, either. Our theory: He'll want to watch his friend Christie Kerr, who is teeing off at 1:07 pm.

10:19 a.m. -- Something to consider as we wait for movement from the First Fan: If he decides to present the trophy to the winner on Sunday evening, chances are strong that he'll present it to a foreign-born golfer.

The leaders after two rounds are from China, South Korea, South Korea, South Korea, Spain, South Korea, South Korea, South Korea, Japan and -- wait for it -- Wayne, N.J.!

Marina Alex, 3 under par and tied for 10th, is the highest American on the leaderboard. She'll be a prohibitive underdog as she looks for her first career victory about 30 miles from where she grew up.

That would be a great story. But if you were a betting man who, say, once owned a few casinos, you'd be wise to take a South Korean. (The pick here: No. 1 ranked So Yeon Ryu, who is four strokes back in great position.)

That was one of my three or four most memorable days covering golf. I was standing outside the clubhouse at Plainfield Country Club, talking to a golfer who had made two holes in one in the final round (he bought the media beer!) when Trump steps out of a black SUV and strolls onto the course.

Crazy scene. Read about it here. He pulled me into a military appreciation tent, where this scene unfolded.

Those are Edison police in the background, offering impromptu protection. Can you imagine that many people around his now? Hard to see that happening.

9:20 a.m. -- The scene on the course right now: Serene.

Steve Politi | NJ Advance Media for NJ.com

If you're looking for a view of where the president lives when he's at his "summer White House," go for a stroll on the 15th hole. The massive compound (photographed from across that fairway) is his home here, complete with fountains, a swimming pool and new construction for the Secret Service. He's in there now.

8:47 a.m. -- The Tweeter-in-Chief has not yet sent a message to his 33 million followers about his plans today, but he did have this one last night:

I will be at the @USGA#USWomensOpen in Bedminster, NJ tomorrow. Big crowds expected & the women are playing great-should be very exciting!

It's hard to argue with the second part of that message -- the golfers have been posting low scores at Trump National despite tough conditions. We have yet to see the "big crowds" part, however. Maybe good weather today will change that.

8:15 a.m. -- Here is an immediate difference from the previous two days at Trump National: X-ray machines.

The media's bags are typically searched before any major sporting event, but several sportswriters and volunteers said on Friday that they went through the gates without security even unzipping their bags -- strange, considering the man who was expected to arrive in a few hours.

That changed on Saturday. Media were screened once before getting onto the shuttle bus and again when arriving at the course. Fans should expect a more extensive process, too.